The Incredible Sulk: Green Day's Billie Joe Armstrong throwing a tantrum at the iHeartRadio Music Festival at the MGM Grand Garden Arena on September 21, 2012 in Las Vegas, Nevada.

Green Day’s Billie Joe Armstrong is headed to rehab after his guitar-smashing outburst at the iHeartRadio Music Festival in Las Vegas, which upset the concert’s corporate sponsors as much as it thrilled the East Bay punk trio’s longtime fans.

The 40-year-old frontman was reportedly upset because his band’s set was cut short to accommodate a longer performance by Usher: “I’ve been around since fucking 198-f—-8,” Armstrong protested. “And you’re gonna give me one f— minute? You’ve gotta be f— kidding me! You’re f— kidding me. What the f—! I’m not f— Justin Bieber, you motherf—.”